Senior Frontend Developer– Chat SDK Lead

Senior Frontend Engineer – Chat SDK Lead Job Title: Frontend Developer Location: Jaipur Experience: 5–10 Years Role Summary We are looking for a Senior Frontend Engineer – Chat SDK Lead to own a React-based component library powering AI chat interfaces across the organization. The role involves technical ownership of the SDK, release management, real-time streaming capabilities, testing, and direct collaboration with consumer engineering teams. Mandatory Skills 5 years of hands-on experience building and shipping React component libraries or SDKs consumed by multiple teams. Strong expertise in TypeScript , including generics, discriminated unions, strict mode, and declaration emit. Strong experience with React and modern frontend architecture. Hands-on experience with SSE/streaming protocols and real-time application development. Strong understanding of AbortController lifecycle and cancellation patterns . Experience with real-time state management using React Query, useReducer, Context , or equivalent approaches. Experience designing and maintaining public APIs/component libraries with a focus on backward compatibility and extensibility. Hands-on experience with release management , including Semantic Versioning (semver), changelogs, breaking-change management, and monorepo tooling. Experience with Turborepo, Changesets , or equivalent monorepo/release management tools. Ability to lead technical discussions with product/engineering teams, negotiate API contracts and technical trade-offs, and prepare migration documentation. Strong experience with automated testing for complex frontend/public API surfaces. Preferred Skills Experience building AI/LLM chat interfaces , including streaming completions and tool-call rendering. Experience with React 19 , including Server Component boundaries and "use client" patterns. Experience with multi-model/provider integrations or AI gateway abstractions. Experience with Storybook, Biome and tsdown . Experience with TanStack React Query . Exposure to OpenAI SSE and AG-UI/custom streaming events . Experience with local-first storage and client-side data eviction strategies. Experience with Portkey AI Gateway or similar multi-provider abstraction layers. Tech Stack TypeScript 5.7 | React 19 | tsdown | Turborepo | Biome | Storybook 10 | TanStack React Query | SSE | Changesets | Private npm Registry Key Responsibilities Own the technical direction and architecture of the Chat SDK . Design and maintain streaming interfaces and real-time state management. Handle complex streaming scenarios including tool-call correlation and provider-specific events. Own SDK release lifecycle, versioning and breaking-change coordination. Establish and maintain comprehensive automated test coverage. Work directly with consumer teams on integration, troubleshooting, API contracts and extensibility. Create migration guides and technical documentation for SDK consumers.